/* 基础样式 */
body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    margin: 0;
    padding: 0;
    color: #333;
    line-height: 1.6;
}

/* 头部样式 */
#navHeader {
    height: 100px;
    background-color: #003e92;
}

.centerHeader {
    height: 100px;
    width: 1100px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo img {
    max-width: 80%;
    padding-top: 10px;
}

.nav-menu {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    align-items: center;
}

.nav-item {
    margin-right: 40px;
}

.nav-link {
    color: white;
    text-decoration: none;
    font-weight: normal;
}

.language-switch {
    color: white;
}

/* 主要内容区域 */
.main-content {
    width: 1100px;
    margin: 0 auto;
    position: relative;
}

/* 英雄区域 */
.hero-banner {
    margin-top: 20px;
    position: relative;
}

.hero-banner img {
    width: 100%;
    display: block;
}

.hero-title {
    position: absolute;
    bottom: 100px;
    left: 80px;
    color: white;
    font-size: 24px;
    margin: 0;
}

/* 通用部分标题样式 */
.section-header {
    position: relative;
    margin-top: 80px;
    margin-bottom: 40px;
}

.section-title {
    color: #003e92;
    font-size: 45px;
    margin: 0;
    display: inline-block;
}

.title-line {
    width: 30px;
    height: 5px;
    background-color: black;
    position: absolute;
    top: 0;
}

.section-subtitle {
    font-size: 24px;
    position: absolute;
    top: 5px;
    left: 120px;
}

.section-tabs {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    position: absolute;
    top: 0;
    left: 380px;
}

.section-tabs li {
    margin-right: 40px;
    font-size: 24px;
    cursor: pointer;
}

/* 新闻区域 */
.news-section {
    clear: both;
}

.featured-news {
    width: 550px;
    float: left;
    position: relative;
}

.featured-news h3 {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: rgba(80, 67, 60, 0.8);
    color: white;
    padding: 10px;
    margin: 0;
    text-align: center;
    font-size: 15px;
}

.featured-news img {
    width: 100%;
    height: 430px;
    object-fit: cover;
}

.news-list {
    width: 500px;
    float: right;
}

.news-item {
    display: grid;
    grid-template-columns: 50px 1fr;
    margin-bottom: 20px;
}

.news-item time {
    font-weight: bold;
    text-align: center;
}

/* 关于我们区域 */
.about-section {
    clear: both;
    margin-top: 120px;
}

.about-content {
    position: relative;
}

.about-image {
    width: 100%;
    height: 550px;
    object-fit: cover;
}

.logo-overlay {
    position: absolute;
    left: 40px;
    bottom: 90px;
    width: 150px;
}

.about-text {
    width: 700px;
    height: 400px;
    background-color: rgba(206, 205, 214, 0.5);
    position: absolute;
    right: 60px;
    top: 100px;
    padding: 20px;
    box-sizing: border-box;
}

.about-text p {
    margin: 10px 0;
    text-align: center;
}

.about-text p:first-child {
    text-align: left;
}

/* 主营业务区域 */
.services-section {
    clear: both;
    margin-top: 120px;
}

.services-grid {
    display: flex;
    justify-content: space-between;
    margin-top: 20px;
}

.service-card {
    position: relative;
    width: 350px;
}

.service-card img {
    width: 100%;
    display: block;
}

.service-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.service-content h3 {
    color: white;
    font-size: 25px;
    margin-bottom: 28px;
}

.service-btn {
    width: 90px;
    color: white;
    border: none;
    border-radius: 18px;
    background-color: blue;
    padding: 5px 10px;
    cursor: pointer;
}

/* 信息公开区域 */
.info-section {
    clear: both;
    margin-top: 80px;
}

.info-grid {
    display: flex;
    justify-content: space-between;
}

.info-column {
    width: 48%;
}

.info-item {
    display: grid;
    grid-template-columns: 70px 1fr;
    margin-bottom: 20px;
}

.info-item time {
    font-weight: bold;
    text-align: center;
}

.info-item h4 {
    margin: 0;
}

.info-meta {
    color: #a8a8a2;
    margin: 5px 0 0;
}

/* 侧边导航 */
.side-nav {
    position: fixed;
    top: 500px;
    right: 20px;
    z-index: 1000;
}

.side-nav img {
    width: 250px;
    height: 300px;
}

/* 页脚样式 */
.main-footer {
    background-color: #d1d1d1;
    height: 300px;
    position: relative;
}

.footer-links {
    text-align: center;
    padding-top: 60px;
}

.footer-links a {
    color: black;
    text-decoration: none;
    margin: 0 10px;
}

.footer-social {
    width: 1100px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    padding-top: 50px;
}

.social-item {
    text-align: center;
    margin: 0 100px;
}

.social-item img {
    width: 100px;
    height: 100px;
}

/* 响应式设计 */
@media (max-width: 1200px) {

    .centerHeader,
    .main-content {
        width: 90%;
    }

    .featured-news,
    .news-list {
        width: 100%;
        float: none;
    }

    .services-grid {
        flex-direction: column;
    }

    .service-card {
        width: 100%;
        margin-bottom: 20px;
    }

    .about-text {
        width: 60%;
        right: 5%;
    }

    .side-nav {
        display: none;
    }
}

@media (max-width: 768px) {
    .centerHeader {
        flex-direction: column;
        height: auto;
        padding: 10px 0;
    }

    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
    }

    .nav-item {
        margin: 5px 15px;
    }

    .section-tabs {
        position: static;
        justify-content: center;
        margin-top: 10px;
    }

    .hero-title {
        font-size: 18px;
        bottom: 50px;
        left: 20px;
    }

    .about-text {
        position: static;
        width: 100%;
        height: auto;
        margin-top: 20px;
    }

    .logo-overlay {
        display: none;
    }

    .footer-links {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
    }

    .footer-links span {
        display: none;
    }

    .footer-links a {
        margin: 5px 10px;
    }

    .footer-social {
        flex-direction: column;
        align-items: center;
    }

    .social-item {
        margin: 10px 0;
    }
}